212129780950 has 24 divisors (see below), whose sum is σ = 394631739720. Its totient is φ = 84836784000.

The previous prime is 212129780939. The next prime is 212129780959. The reversal of 212129780950 is 59087921212.

It is a self number, because there is not a number n which added to its sum of digits gives 212129780950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212129780959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92835 + ... + 657934.

It is an arithmetic number, because the mean of its divisors is an integer number (16442989155).

Almost surely, 2^212129780950 is an apocalyptic number.

212129780950 is a deficient number, since it is larger than the sum of its proper divisors (182501958770).

212129780950 is a wasteful number, since it uses less digits than its factorization.

212129780950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756432 (or 756427 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 212129780950 in words is "two hundred twelve billion, one hundred twenty-nine million, seven hundred eighty thousand, nine hundred fifty".